WO1998013218A1 - Composition and method for polishing a composite - Google Patents

Composition and method for polishing a composite Download PDF

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Publication number
WO1998013218A1
WO1998013218A1 PCT/US1997/017503 US9717503W WO9813218A1 WO 1998013218 A1 WO1998013218 A1 WO 1998013218A1 US 9717503 W US9717503 W US 9717503W WO 9813218 A1 WO9813218 A1 WO 9813218A1
Authority
WO
WIPO (PCT)
Prior art keywords
silica
silicon nitride
compound
complexes
polishing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1997/017503
Other languages
English (en)
French (fr)
Inventor
Sharath D. Hosali
Anantha R. Sethuraman
Jiun-Fang Wang
Lee Melboure Cook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rodel Inc
Original Assignee
Rodel Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rodel Inc filed Critical Rodel Inc
Priority to EP97945351A priority Critical patent/EP0930978B1/en
Priority to JP51599698A priority patent/JP4163752B2/ja
Priority to DE69724632T priority patent/DE69724632T2/de
Publication of WO1998013218A1 publication Critical patent/WO1998013218A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing
    • C09K3/1463—Aqueous liquid suspensions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
    • H10P95/00—Generic processes or apparatus for manufacture or treatments not covered by the other groups of this subclass
    • H10P95/06—Planarisation of inorganic insulating materials
    • H10P95/062—Planarisation of inorganic insulating materials involving a dielectric removal step
    • H10P95/064—Planarisation of inorganic insulating materials involving a dielectric removal step the removal being chemical etching

Definitions

  • the present invention relates to compositions which are useful as slurries for the chemical-mechanical polishing of substrates, especially substrates comp ⁇ sed of silica and silicon nitride. More specifically the slurries of the present invention include an aqueous medium, abrasive particles, a surfactant, and a compound which complexes with silica and silicon nitride
  • Patent 5502007 also describe obtaining selectivities of about 10 S ⁇ 0 2 to 1 S ⁇ 3 N removal rates using a colloidal silica slurry as a polishing agent.
  • Kodera et al., U. S. Patent 5445996 use ce ⁇ a as well as silica for the abrasive particles m slurries, but they also report selectivities for S ⁇ 0 2 to S ⁇ 3 N 4 removal rates in the range of2 to 3 SUMMARY OF THE INVENTION
  • a composition for polishing a composite comp ⁇ sed of silica and silicon nitride comprising: an aqueous medium, abrasive particles, a surfactant and a compound which complexes with the silica and silicon nitride wherein the complexing agent has two or more functional groups each having a dissociable proton, the functional groups being the same or different
  • a further aspect of the invention is the method for polishing a composite comprised of silica and silicon nitride comprising applying a slurry at a polishing interface between a polishing pad and the composite comp ⁇ sed of silica and silicon nitride, the slurry comprising, an aqueous medium, abrasive particles, a surfactant and a compound which complexes with the silica and silicon nitride wherein the complexing agent has two or more functional groups each having a dissociable proton, the functional groups being the same or different
  • Carboxylate and hydroxyl groups are preferred as these are present in the widest variety of effective species
  • Particularly effective are structures which possess two or more carboxylate groups with hydroxyl groups in an alpha position, such as straight chain mono- and di-carboxy c acids and salts including, for example, malic acid and malates, tarta ⁇ c acid and tartarates and gluconic acid and gluconates
  • t ⁇ - and polycarboxylic acids and salts with secondary or tertiary hydroxyl groups in an alpha position relative to a carboxylic group such as citric acid and citrates.
  • a salt of phthalic acid is used as the complexing agent and, therefore, such salts are preferred complexing agents for this invention.
  • Potassium hydrogen phthalate, "KHP" was the phthalate salt used in the experiments described below.
  • the surfactant used in conjunction with the complexing agent in this invention is not present to perform the usual function of surfactants in slurries of stabilizing the particulate dispersion.
  • the surfactant in combination with the complexing agent affects the rate of removal of Si 3 N from the composite surface. It is believed that any surfactant, whether it be an anionic, cationic, non-ionic or zwitter-ionic surfactant, might be effective in the compositions of this invention. Particularly useful would be fluorocarbons or hydrocarbons with phosphate end groups. In the following examples several different surfactants were shown to be effective.
  • ZFSP ZONYLTM FSP Fluorosurfactant
  • ceria was used for the abrasive particles in the slurry because it is an effective polishing abrasive for chemical -mechanical polishing at all pH conditions and is stable against gelation. Any other polishing abrasive, such as alumina, zirconia, silica, titania and barium carbonate could also be used.
  • any base or amine compound might be used.
  • KOH is used to adjust the pH of the slurry compositions.
  • Potassium hydroxide, ammonium hydroxide, and all types of soluble amine compounds may be used to adjust the pH of chemical-mechanical polishing slurries.
  • Table 1 shows the results of polishing silicon dioxide and silicon nitride wafers with slurries containing various amounts of complexing agent at selected pH levels. These experiments were carried out on a Strasbaugh 6DS SP Planarizer using an IClOOO/SubalV polishing pad stack under the conditions of 7 psi down pressure, 1.5 psi back pressure, 30 rpm carrier speed and 32 rpm table speed with a slurry flow rate of 125 ml/min. 6 inch wafers were used and the pad was conditioned after each wafer was polished. All slurries in this series of experiments contained 0.45% colloidal ceria and 0.2% ZFSP surfactant and the pH of the slurry was adjusted using potassium hydroxide.
  • abrasive used was WS2000 available from Rodel, Inc.
  • WS2000 is an abrasive which contains both ceria and silica.
  • the slurry used for this expe ⁇ ment contained 3.5% abrasive, 1.5% KHP (potassium hydrogen phthalate), and 0.2% ZFSP (ZONYLTM FSP).
  • the pH was about 6.5. Results from the polishing of wafers under the same conditions as in Example 1 are shown on Table 5 below:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
PCT/US1997/017503 1996-09-27 1997-09-26 Composition and method for polishing a composite Ceased WO1998013218A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97945351A EP0930978B1 (en) 1996-09-27 1997-09-26 Composition and method for polishing a composite
JP51599698A JP4163752B2 (ja) 1996-09-27 1997-09-26 複合物を研磨するための組成物及び方法
DE69724632T DE69724632T2 (de) 1996-09-27 1997-09-26 Zusammensetzung und methode zum polieren eines komposits

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US2727796P 1996-09-27 1996-09-27
US60/027,277 1996-09-27
US08/802,829 US5738800A (en) 1996-09-27 1997-02-19 Composition and method for polishing a composite of silica and silicon nitride
US08/802,829 1997-02-19

Publications (1)

Publication Number Publication Date
WO1998013218A1 true WO1998013218A1 (en) 1998-04-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/017503 Ceased WO1998013218A1 (en) 1996-09-27 1997-09-26 Composition and method for polishing a composite

Country Status (5)

Country Link
US (2) US5738800A (https=)
EP (1) EP0930978B1 (https=)
JP (1) JP4163752B2 (https=)
DE (1) DE69724632T2 (https=)
WO (1) WO1998013218A1 (https=)

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EP0878838A3 (fr) * 1997-04-07 1998-12-16 Clariant (France) S.A. Nouveau procédé de polissage mécanochimique de couches de matériaux semiconducteurs ou isolants
US6436835B1 (en) 1998-02-24 2002-08-20 Showa Denko K.K. Composition for polishing a semiconductor device and process for manufacturing a semiconductor device using the same
JP2003055648A (ja) * 2002-06-04 2003-02-26 Hitachi Chem Co Ltd 研磨剤及び基板の研磨方法
EP2682441A1 (en) * 2012-07-06 2014-01-08 Basf Se A chemical mechanical polishing (CMP) composition comprising a non-ionic surfactant and an aromatic compound comprising at least one acid group
KR20170097090A (ko) * 2014-12-12 2017-08-25 캐보트 마이크로일렉트로닉스 코포레이션 Sti 웨이퍼 연마에서 감소된 디싱을 나타내는 cmp 조성물
EP3149101A4 (en) * 2014-05-29 2018-01-24 Cabot Microelectronics Corporation Cmp compositions selective for oxide over polysilicon and nitride with high removal rate and low defectivity

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878838A3 (fr) * 1997-04-07 1998-12-16 Clariant (France) S.A. Nouveau procédé de polissage mécanochimique de couches de matériaux semiconducteurs ou isolants
US6436835B1 (en) 1998-02-24 2002-08-20 Showa Denko K.K. Composition for polishing a semiconductor device and process for manufacturing a semiconductor device using the same
JP2003055648A (ja) * 2002-06-04 2003-02-26 Hitachi Chem Co Ltd 研磨剤及び基板の研磨方法
EP2682441A1 (en) * 2012-07-06 2014-01-08 Basf Se A chemical mechanical polishing (CMP) composition comprising a non-ionic surfactant and an aromatic compound comprising at least one acid group
EP2870599A4 (en) * 2012-07-06 2016-03-30 Basf Se A chemical-mechanical polishing composition comprising a non-ionic surfactant and an aromatic compound having at least one acid group
EP3149101A4 (en) * 2014-05-29 2018-01-24 Cabot Microelectronics Corporation Cmp compositions selective for oxide over polysilicon and nitride with high removal rate and low defectivity
KR20170097090A (ko) * 2014-12-12 2017-08-25 캐보트 마이크로일렉트로닉스 코포레이션 Sti 웨이퍼 연마에서 감소된 디싱을 나타내는 cmp 조성물
KR102556208B1 (ko) 2014-12-12 2023-07-19 씨엠씨 머티리얼즈 엘엘씨 Sti 웨이퍼 연마에서 감소된 디싱을 나타내는 cmp 조성물

Also Published As

Publication number Publication date
JP2001501369A (ja) 2001-01-30
US5738800A (en) 1998-04-14
EP0930978A4 (en) 2001-05-02
US6042741A (en) 2000-03-28
DE69724632T2 (de) 2004-06-03
JP4163752B2 (ja) 2008-10-08
EP0930978B1 (en) 2003-09-03
EP0930978A1 (en) 1999-07-28
DE69724632D1 (de) 2003-10-09

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